Locking mechanism.



- C. P. HOFFMAN.

LOCKING MECHANISM.

APPLICATION FILED AUG. 6, 1912.

Patented Nov. 18, 1913.

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PV] T NESSE S (LP. HOFFMAN.

LOCKING MECHANISM.

APPLICATION FILED AUG. 6, 1912. 1,079,0Q7, Patented Nov. 18, 1913.

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WITNESSES INVENTOR /1A 0 Allorney COLUMBIA PLANOGNAIN cn wmuwmvw. IL c.

CHARLIE P. HOFFMAN, OF CARROLLTON, OHIO.

LOCKING MECHANISM.

Specification of Letters Yatent.

Application filed August 6, 1912.

Patented Nov. 1.8, 191.3.

Serial No. 713,623.

To all whom it may concern:

Be it known that I, CHARLIE P. IIOFFMAN, a citizen of the United States, residing at (larrcllton, in the county'of Carroll and State of Ohio, have invented new and useful Improvements in Locking Mechanism, of which the following is a specification.

My invention relates to improvements in locking mechanism for emergency exit doors for aiu'litoriums and the like.

One objectof my invention is to provide an improved construction of locking means which will permit the door being opened by movement against the same in one direction whereby the door may be readily opened in case of fire or panic.

The invention consists in the details of parts effecting the sliding of the door bolts, which mechanism consists principally of connected levers which are operated by swinging or pivoted means.

ihe preferred embodiment of my invention is hereinafter described and illustrated in the accompanying drawings.

In these drawings ;Figure 1 is a front view illustrating the invention. Fig. 2 is a side view of the door and locking means thereon. Fig. 3 is a perspective view of one of the bolt supporting plates and actuating levers, and, Fig. 4 is a detail perspective view illustrating the main actuating levers and the pivoted structure operating the same.

Referring to the drawings, 1 designates a door, 2 a frame therefor and 3 the floor of a building. Adjacent the top and bottom of the door and in alinement, are secured similar plates or brackets 3 which are provided with housings 4 in which are slidably mounted locking bolts 5 which are adapted to engage keeper sockets 6, one provided in the frame 2 and one in the floor 3. The housings are provided with elongated slots 7 in which are adapted to slide pins 8 one connected to each bolt 5.

To each plate 3 is pivoted at 9 a bolt shifting lever 10 each of which has a bifurcated end to provide an opening 11 in which the pins 8 are received. Said levers 10 at one end, each have a bracket 12 secured thereto and each bracket has an angle arm to which is pivoted at 13 operating levers 14:. Said operating levers 14 are bolted or otherwise pivoted together at 15. One or both of the levers 10 may be provided with a return )ring 16 connected thereto and to the plates 3 as shown.

The numeral 17 designates a frame which pivoted by means of a cross rod 18 in brackets 19 secured to the door. Said frame 17 may be provided with any suitable number of cross bars 20, or similar means which may abut against the lovers 14 to actuate the same.

The levers 141, when the bolts are in position locking the door, project at an angle to each other as shown in full lines in Fig. 2. The frame 17 is hel d in position to be moved against the lovers 14 by any suitable means, such for instance, as the link 21 pivoted at 22 to the door 1 and which has an elongated slot 23 in which moves a pin 2-1 secured on the frame.

As stated, Fig. 2 shows the parts in looking position in full lines. Said figure also shows parts in unlocked position in dotted lines. When the door is opened the frame 17 is pressed against the same which moves the lovers to the position shown in dotted lines in Fig. 2, which action raises the levers 10 at their bracket ends. The levers by means of their engagement with the pins 8, as described, retract the bolts 5 and permit the door to open. hen in open position the return spring 16 tends to force one of the bolts 5 firmly in engagement with the floor so as to prevent the return or swinging of the door. W'hen the door is locked the spring 16 also tends to hold the bolts in locked position.

It is clear that the details of construction may be varied within the spirit and scope of the appended claims.

Having thus described my invention, what I claim is:

1. In locking mechanism of the class described. a bracket. a bolt slidably mounted on said bracket. a lever actuating said bolt pivoted to said bracket, a second lever pivoted to said first lever, and means to shift said second lever.

2. In locking mechanism of the class described, a plurality of slidable bolts, first levers for operating said bolts, the pivot members for said levers, second levers connor-ted to said levers and to each other, said pivot members located intermediate said bolts and second levers, and a pivoted device operable against one of said second levers.

3. In locking mechanism of the class described, a slidable bolt member, a lever member actuating said bolt member, one of said members provided with a projection and the other of said members provided with a slot to engage said projection, a lever member pivoted to said lever, and a pivoted member operable against said lever member.

4t. In locking mechanism of the class de provided with a pin, each housing provided \VltlL a slot for said pins, a shifting lever for each bolt, each of said levers provided with a slot engaging the bolt pins, second levers pivoted together and one connected to each of said bolt shifting levers, and a movable device operable against one of said second levers.

6. In locking mechanism of the class described, a plurality of slidable bolts, a housing member for each bolt, each bolt pro vided with a pin, each housing provided with a slot for sald pm, each housing hav ng pivoted thereto a bolt shifting lever, return spring means for said bolts, each lever engaging one of said pins, second levers pivoted together, and one pivoted to each of said shifting levers, a pivoted device movable against one of said second levers, and means to support said device in position adjacent the second levers.

7. In locking mechanism of the class described, a bracket, a bolt slidably mounted on said bracket, a lever actuating said bolt pivoted thereto, a second lever pivoted to said first lever, and means to shift said second lever.

CHARLIE P; HOFFMAN. Witnesses A. K. RADER, ll M. MOFFETT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. V 

